Laboratory results of foam application testing for longwall shield dust control in a simulated environment
作者机构：CDC-NIOSHPittsburghPAUSA
出 版 物：《International Journal of Coal Science & Technology》 (国际煤炭科学技术学报（英文）)
年 卷 期：2021年第8卷第2期
页 面：217-227页
核心收录：
学科分类：0808[工学-电气工程] 0819[工学-矿业工程] 081903[工学-安全技术及工程] 08[工学] 0807[工学-动力工程及工程热物理]
主 题：Longwall Shields Foam Respirable Dust Silica Dust
摘 要：There were 37 longwall faces operating in mines in the United States in *** average panel width for these longwalls was approximately 368.5 m(1209 ft).This translates to a range of approximately 170-240 shields per longwall,depending upon the width of *** movement of longwall shields is a significant contributor to respirable dust overexposures to longwall *** is expected to have the potential to reduce this shield dust *** foam is applied to the area on the roof between the coal face and the shield tip after the shearer *** this study,the longwall shield dust simulator was used to test three foam agents for their ability to control dust from longwall shield *** showed that at low-velocity ventilation(≈3.0 m/s(600 fpm))all foam agents were able to produce dust reduction levels of at least 45%.At high-velocity ventilation(≈5.1 m/s(1000 fpm)),the reductions were lower and more variable,ranging from being undeterminable for one foam agent to having 46%-63%reductions for the other two foam agents,with one instance of an increase in dust ***,the use of foam agents can provide longwall shield dust *** factors are roof coverage and the ability of foam to remain on the roof for extended time periods.
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